George Stratton reported on experiments in which he wore eyeglasses that inverted his visual field of view. Stratton argued that since the image upon the retina was inverted, it seemed reasonable to examine the effect of presenting the retina with an "upright image".

His "upside-down" glasses consisted of two lenses of equal focal length, spaced two focal lengths, so that rays of light entering from the top would emerge from the bottom, and vice-versa. Stratton, upon first wearing the glasses, reported seeing the world upside-down, but, after an adaptation period of several days, was able to function completely normally with the glasses on.

George Stratton reported on experiments in which he wore eyeglasses that inverted his visual field of view. Stratton argued that since the image upon the retina was inverted, it seemed reasonable to examine the effect of presenting the retina with an "upright image".

His "upside-down" glasses consisted of two lenses of equal focal length, spaced two focal lengths, so that rays of light entering from the top would emerge from the bottom, and vice-versa. Stratton, upon first wearing the glasses, reported seeing the world upside-down, but, after an adaptation period of several days, was able to function completely normally with the glasses on.

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